Machine for cutting designs on rolls



Feb. 9, 1960 i L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet 1 h "a Q u Y INVENTOR TTORNEYS ATTORNEYS.

Feb. 9, 1960 L.,J. EHLINGER MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet 2 INVENTOR LOU/5 fHZ/NGE/Q 9, 19 L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS 0N ROLLS Filed July 6. 1954 15 Sheets-Sheet 4 INVENTOR TTORNEYS Feb. 9, 1960 L. J. EHLINGER MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6. 1954 15 Sheets-Sheet 5 I TTORNEYS.

Feb. 9, 1960 J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS 0N ROLLS Filed July 6, 1954 15 Sheets-Sheet 6 1m "I 753' I54 5;

I55 I [56' [g I E? H INVE NTOR ATTORNEYS Feb. 9, 1960 L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet '7 E f? m 706 {g I 707 L 70.2 97 35' 7/ 96 100 35 98 I 95 I72 C 10/ 7 63 f y Z0.

TTORNEYS Feb. 9, 1960 L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet 8 INVENTOR 100/; J. [film 6.6?

WZYw ZZ W W Feb. 9, 1960 1.. J. EHLINGER 2,924,153

MACHINE FOR cumm; DESIGNS on ROLLS Filed July 6. 1954 15 Sheets-Sheet 9 if INVENTOR TTORNEYS Feb. 9, 1960 L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS 0N ROLLS Filed July 6. 1954 15 Sheets-Sheet 10 INVENTOR ORNEYS 1950 L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet l1 1'8 INVENTOR 100/5 .1 [HZ/lYGf/Q BY 2% I M Q I ATTORNEYS 1960 J. EHLINGER 2,924,153

I MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet 12 0 Q INVENTOR 100/; J. [#1 man BY Z07- M637.

ORNEYS 1950 L. J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet 13 iNVENTOR 100/5 J [HAM/6&7? 364- BY ORNEYS.

Feb. 9, 1960 L..J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS ON ROLLS Filed July 6, 1954 15 Sheets-Sheet 14 INVENTOR 10m" J [HZ/N65? TTORNEYS Feb. 9, 1960 J. EHLINGER 2,924,153

MACHINE FOR CUTTING DESIGNS on ROLLS Filed July 6, 1954 15 Sheets-Sheet 15 INVENTOR 100/! J. [HZ/N65? ATTORNEYS United States Patent MACHINE FOR CUTTINGDESIGNSDN ROLLS Louis J. Ehlinger, Conshohocken, Pa.,,assignor to Alan Wood Steel Company, Coushohocken, Pa., a corporation of Pennsylvania ApplicationJuly 6, 1954,.SerialNo. 441,215.

3 Claims. (Cl. 90-56) The present invention relates to mechanism formachining the surfaces of 'rolls.

A purpose of the invention is to obtain more accurate positioning of cutters in machining the surfaces of rolls, such as rolling mill rolls, and to permit rapidand very accurate registry of successive machiningpoints inreference to other machining points, both angularly andlongitudinally, as well as diagonally.

A further purpose is to mount a longitudinalcarriage on a bed, to provide a crossfeedcarriage on the'longitudinal carriage, to locate'cutterson-the cross-feed carriage, and to automatically advance and retract thefeed of the cross feed carriage and adjust the indexing position of a work roll operated upon bythe cutters.

A further purpose is to employ a doublezcam, having a track for control of angular indexing, and a track-for control of cross feed, the track for control of angular indexing having an ineffective portion at a position where a track for control of cross feed has an effective portion, with means operatively connected to the track for control of angular indexing, and means operatively connected to the track for controlling cross feed for'changingcross feed.

A further purpose is to provide a turnable indexing plate, carn means for retracting and advancing the indexingplate, means for pivotally mounting the work roll on its axis, and indexing wheel or gear connected axially to the work roll, and an operative pawl onthe'indexing plate engaging the gear-with advance of the=indexing plate.

A further purpose is to provide atstop pawl engaging the indexing gear, cam means" operative between the indexing plate and the stop pawl for moving the stop pawl A further purpose is to provide release mechanism on the trip means for permitting the trip cam to' pass'beyond the trip means without releasing the locking pawl on retraction of the indexing plate.

A further purpose is to mount the cutters on swingable heads and provide detent means for holding. the cutters in one of a plurality of selected positions.

A further purpose is to provide driving shaftssfor the individual cutters, cutter heads for the individual cutters journalling the driving shafts, detent means for'securing the cutter heads in one of a plurality of predetermined positions and gearing common to the driving shafts of the individual cutters, and driving such cutters in. all angular positions of the cutter heads.

A further purpose is to employ an indexing gear having indexing teeth, automatic means for drivingthe indexing gear forward tooth by tooth, a driving plate connected to a work roll, tooth recesses in the driving plate which give one-half space at the roll for adjustment to ice the :indexing gear, and chuck means connected to. the indexing gear for. selectively engagingone' or another of the toothrecessesto secure one-half tooth spacing.

A further purpose is to provide a longitudinal indexing racktsecu-red to. the longitudinal carriage, a longitudinal chuck secured to the rack,.and locking-key; means making engagementof the chuck to a selected position along the longitudinal rack.

A further. purpose is to "reverse the lockingkey means to obtain a one-half chuck tooth adjustment of. the locking key position.

A further purpose is to mounta set-up gaugeextending from the longitudinal. chuck to a position adjacent the: end of the work roll, andv to mount the chuck adjustably-ona lead screw topositionzthe chuck-'adjustably for the desired position of thewset-up gauge.-

A' further purpose is to provide a1cutter head having a central driving shaft, a first 45 bevel gear on the central drive;shaft, a second 45 F bevel gear angularly disposed attli'e forward end. and engaging the first 455 bevel gear, a third 45 bevel gear forward of the second, and meshing Withsnfl'le second, a' cutter shaftjournalled in the head at right: anglesto the axis. of the head. extendinginwardly, and a cutter on the cutter shaft at. the axis of the head.

In.-th'e= drawings. I hayechosen'to illustrate one only of the numerousembodiments in which my invention may appear; selecting the forms shownfrom I the standpoint of convenience; in illustration, satisfactory operation and clear: demonstration of the principles involved.

Figure 1 is a fragmentary front elevationof'thecomplete-v assembly.

Figure Z is :a fragmentary'plan of the-.completeassembly as shown in Figure 1.

Figure?) is a front elevation .of atypical rolling mill roll of the type which is beingmaehined in accordance with the invention.

Figure 4 is a diagrammatic fragmentary front elevation of the: roll of Figure 3, showing the first operation of cutting Figures 5 to 9 inclusiveshow-successive steps in cutting .the roll, the operation being completed in Figure 9.

Figure 10 is an enlargedfragmentary. elevation of vthe completed roll face.

Figure 11 isan enlarged exploded perspective view showing the crossfeed carriage and the longitudinal vfeed carriage, eliminating extraneous components.

FigurelZ is a vertical section. on the line 12-12 of Figure'l.

Figureq13 is a plan sectionon the line 13-13 of Figvure 1.

Figure 14 is a vertical section on the line 14-14 of -Figure' 13;

Figure 15 is a vertical section on the line 15--15'of Figure 12.

Figure. 16v is a rear elevationof thecutter head in operatingposition. t

Figure 17 is a section on the line 17-17 of Figure 16.

Figure18 is a plan section on the. line 18,18.ofFigure 12. I

Figure 19 is a fragmentary view, partly in section, showinglone of the cutter heads in position in the cross feed carriage.

Figure. 20 is a fragmentary enlarged front elevation, partly in section, of the longitudinal indexing assembly.

Figure 21 is a fragmentary'view, partly in section, of the longitudinal indexing chuck withlthe indexing key 'reversed'for cutting diamonds of the'opposite hand.

Figure'22 isan' exploded perspective view, partly in j section, of the longitudinal indexing parts,

Figure 23 is an enlarged section on the line-23-23 a of Figure 20.

Figure 24 is an enlarged plan section on the line 24-24 of Figure lshowing'the clutch for engaging the handle for adjusting the cross carriage. 1

Figure 25 is an enlarged vertical section on the line 25-25 ofFigure 1.

Figure 26 is an enlarged fragmentary elevation, partly in section, of the cam and associated parts. i

Figure 27 is a fragmentary plan view of the 'cam drum and associated parts.

Figure 28 is a section on'the line 28-28 of Figure 26 showing the feed shaft and gear.

Figure 29 is a section on the line 29-29 of Figure 26 showingthe cam follower for the feed gear.

Figure 30 is a section on the line 30-30 of Figure 26 showing the cam follower for circumferential indexing.

Figure31 is a section on the line 31-31 of Figure 25 showing theindexing cam.

Figure 32 is a section on theline 32-32 of Figure 25 showing clutch details.

Figure 33 is an exploded perspective view showing major circumferential indexing parts which are inside the indexing cam.

Figure 34 is a section on the line 34-34 of Figure 31 dexing cam.

Figure 35 is a section on the line 35-35 of Figure 34.

I Figure 36 is a section onthe line 36-36 of Figure 35. Figure 37 isa'section on the line 37-37 of Figure 34. "Figure38 is a section on the line 38-38 of Figure 37. Figures 39,. 40, 41 and 42 are diagrammatic axial views showingsuccessive stages 'of operation'in turning the indexing wheela not in limitation and has involved a great deal of'set-up time for machining. Furthermore, a slight error in location of an individual recess involved in a pattern is likely to result either in spoiling the roll, necessitating a costly repair, or producing irregular products when the roll is used.

The invention is applicable particularly for rolling mill rolls which are used in making floor plate of the character whichare employed on the floors of: ships, industrial plants, industrial equipment and the like, hav- -ing a raised pattern produced in steel, stainless steel,

aluminum, magnesium or some other metallic material. Theinvention is applicable to the production of rolls for rolling sheets and plates of other characters, whether in metal, plastic, or other material, as well as to print ing rolls for textiles or the like.

In accordancev with the invention, it'is possible to produce several symmetrical recesses at one time bya 'group of cutte'rs'operating in unison and then to index The production or r the cutters very accurately and automatically to produce successive angularly displaced cuts. The group of cutters are then accurately indexed longitudinally to the next position and in this position 'the automatic angular indexing continues until cuts have been made around the roll atthat position, After all cuts have been made at a particular diagonal direction, for example right hand, the mechanismis adapted for accurate indexing to' accomplish precise cutting of a left, hand series of recesses. The possibility of making an error inlocation of an individual cut and thus "spoiling the roll or re- "quiring a' costly repairon the roll is largely eliminated,

and it is possible with a high degree of precision 'to make several. different rolls which. are alike. in location of the recesses and in recess contour.

Furthermore when it is necessaryto face or turn down the roll, the recesses can be recut very accurately without danger of cutting into wrong locations or cutting new recesses which do not register with the remainder of the recesses previously cut.

Thus the invention lends itself .to the production; of

new rolls having machined orpatterned surfaces, and

also to the recutting of patterns after the; roll has been surfaced, and thus slightly reduced, in diameter.

The main assemblies of the mechanism of the invention are the bed assembly A, the. longitudinal carriage assembly B, the cross. carriage assembly C, the cutter assembly D, the longitudinal indexing assembly E, the cam assembly F, the feed assembly G and the circumferential indexing assembly H.

The roll 50is supported from a main frame 51 of a lathe by a head stock 52 and a tail stock 53. The head stock includes a housing 54 having bearings 55 (Figures 31 and 32) which support a spindle 56 having a center 57 which is located in a center recess 58 at one end of the roll The spindle is held inplace by a retainer 60.

The bed has longitudinal ways 61 which engageguide surfaces 62 (Figures 1, 11 and 12) on a longitudinal carriageframe 63, so as to permit the longitudinal car- 'riage B to slide along the ways to any desired position.

The longitudinal carriage is manipulated longitudinally along a rack on the bed of the lathe by pinion 65 1 (Figures 1,13 and 14), on shaft 66journalled at 67 .in' gear housing 68. Shaft 66 is keyed to reduction gear 70 which meshes: with pinion 71 on sleeve 72 moving freely on bearings 73 around shaft 74. The

sleeve 72. is keyed to. reduction gear 75 which meshes with pinion 76 on sleeve 77 which turnson bearings 78 freely around shaft 66. Sleeve 77-is keyed to reduction gear 80, which meshes with pinion 81 keyed to shaft 74 and carrying adjustment hand wheel 82.

A screw 83, normally part ofthe lathe, extends longitudinally, and for the purposes of the present invention is stationary. Mountedstationarily but longitudinally adjustable. on the screw 83,.is longitudinally indexing assembly E. This comprises a longitudinal indexing chuck 84 (Figures 20 to 23) which has a guide 85 engaging the way 61.on thelathebed, and has a depending portion 86 which extends down and under the rack 64, providing an abutment 87: beneath the rack which enables the chuck to be locked with respect to the lathe by wedge 88 extending between the rack 64 and the abutment 87. Portions of the depending part 86 of the chuck extend down toengage screw 83,. and one adjustment nut 90 on screw 83 operates in recess 91 94 betweenthe end of the set-up gauge and the roll. The

set-up gauge is conveniently used to locate the correct position'of the chuck 84 at the beginning of the machinis engaged by a toothedkey 101 extending vertically in an opening 102 in the top of the chuck .84. The key is locked inpositionin engagement with a particular tooth of the rack, by'handle 103 which is fastened on shaft 104 Once the chuck has achieved its :5 ?jonrnaledi in'br'acket '5. :lR'igidly' mounteduontthe shaft 104 are arms 106 which pivotally-engage pin :107swhi'ch pivots in the key 101, and permits raising or flowering of the key by manipulation of thei-indexinghandle 103.

The tooth key 101 .isreversible -in the.openingz'il02'to 1' "determine a half tooth change in position-in reference ''-to the rack by removing pin 107- 'after extractingtcotter '112 which has a plurality, suitably six, ofrecesses 113 extending in the transverse direction for mounting cutters as later explained.

The manipulation of the carriage cross ways is accomplished by cross carriage leadscrew 114 (Figure 12) which engages in nut 115 journalled in the crosscarriage at 116. The cross feedmay be operated in several different ways. The cross feed adjustmentxhandle 117 is mounted on clutch element 118'keyed to' and 'slidable on a shaft portion 120 which is suitably in continuation of the screw 114. Thus the handle 117 can adjust the feed screw. The clutch will normally be engaged except when an individual feed screwv must be backed 01f to change cutters.

The jmachine is preferably initially set up as follows: i All cuttersare adjusted at 136 until they each engage the face of the roll. Then the cutters are started and each is fed'forward 7 inch or forthe desireddepth of The screw is journalled at 127- onan upwardly extend ingportion 128 of the longitudinal carriage.

- Cross feed is also automatically accomplished by feed shaft 130'journalled at one end at 131 on the cam mechanism to be. described, and journalled at the other end carriage. .The said shaft 130 carriesat one:end a bevel rgear1-33 (Figure 24) whichengages a cooperating bevel gear 134 loose on the cross ,leadscrew. 114. Cooperating aclutch element 121 is on thevsame member asbevel gear .133 so that, when'the clutclris' engaged shaft .130 will drive the feed screw.

"The cylindrical recess 113 in-the vcross feedacarriage receivescutter heads135 (Figures 12 m 19) which have threaded :o'n their forward .ends adjustment rings 136, "which engage between a shoulder;137 on the forward end of the cross feed carriage, anda'locking plate 138 which is secured by bolts 140 to the cross feedcarriage. Thus the-head can be turned as laterexplained butretains the axial position determined bythe adjustment ring 136. The position of the adjustment ring onthe'individual head 'can be changed in aligning tall 'cuttersinto the. same line. 1 p

The-individual head has acutter' shaft 141 which is journalled at 142 and 143 generally radiallyof the head andcarrie's a cutter 144 of milling'cutterrtype secured by nut'145 and also carries bevelgear 14-6. The bevel j-gear146 meshes with a 45cooperating; =bevel gear 147 'jo'urnalled at 148 in the head andnthe bevel gear 147 -4In'turn meshes with-a 45 cooperating bevel gear 150 on driving;shaft-;-151 journalled sin the1head at :-The

zzotheraendof thesfishaft 151'-;carries gean 153 which meshes with;pinion:154 'onvshaft 155.;journalledat 156 and. 157 J ainthe cross: feed :;carriage.. vThe' shaft .155 connects a by flexible .couplingr158' with 'cutter=:driving motor 160' which is common to each paircoftcutters.

The cutter head hasfaspairofpositioning grooves 161 ands-162, 90 0ut:of;rphase,r:whichiin adjusting position receive :locking:pin' 1631rin1-the cross feed carriage. A turning bar 164 is removablyiintroduced into a recess 165 in the cutter :head to taid,intturning'the cutter head from the left hand toflthers'right handdiagonal position as bestseen in Eigure.;l6,uorivice :versa. The pin 163 ex- 1. tends through anopening166izinithe cross feedcarriage.

The feed mechanism (Figuresl; 2, 25 to 30) in automatic operation is driven :Ibyimotor 167 at theiextreme left end of the device,while drives-reduction gears 168, which. in turn drive cam i shaft 17 0 journalled at 17-1'on (the frame, and. carrying:a;double barrel cam 172. The

camhas a cuttenfe'ed'track 173- which: is engaged by follower roller 174, pivotally 'mounted on shaft 175 which is cam. lever bearing-178 on the' f-rarne.

segment1180, which meshes w-ith' pinion 181 keyed on feed at 132 in the upward extension 128 ofthe longitudinal shaft 130 already described. Pinion 181 is held on feed shaft: 130 by key 132 (Figure 28) i-n elongated keyway 183, which extends throughpinion 181 and also through i an extension 184 from the pinion which is journalled 'at 185 in the follower'leverbearing. i The extension 184 is held byretainer 186.

The cam 172 also has-an angt1lar= indexing track 187 which guides followerroller1 88 '-(-F igure 30) on shaft 190 journalledin i follower arm 191 which is journalled at 192 on' shaft I93 Which is "rigidly mounted on the follower journal bearing. 'I he'arm 191' forms part of a bell crank (Figures '25 and 26)"havinga separate arm 194 which makes pivotal connection at 195 with a link "196 pivotally connected -at' 1* 9 7atithe opposite end with threads securethe link in-any particular adjusted position.

The indexing plates'-20'0 '(*Figures'31 t0 43) are joined together at the circumference byspacer 202, secured by bolts 203. At the radial intefioredge, the indexing plates-are joined by screws 204* to hubs=205 which journal at 206 on indexing head 207.

The indexing head also journals the rotating spindle 56 as earlier explained; which is-k'eyed at 208 to indexing -wheel (gear) 210 which at its circumference is engaged by three different'pawls. The operating pawl .211 is pivoted at 212 ontheindexing plates-200, and is urged toward engagement with theteeth' ofthe wheel by helical I compression spring 213 acting from spring seat 214 which is secured to the indexing plates by bolts 215. It'will be evident that operating pawl"211 turns-with the. indexing plates.

Stop pawl 216 is pivotedat 217 on -bracket'218 from the indexing head. St0p-pawl216 near its toothend which engages the indexing wheel hasashaft 220 journalled on the stop pawl and provided'at itsoppositeends with followers 221 '(Figure3'8) which engage in cams 222 secured to the indexingplates200L An opposing locking pawl 223' ispivote'd at 224- on bracket 225 from the indexing hea'dfand has two-tooth engagement at 226 and 227 withthe'iridexing wheel, rather than single-tooth engagementas-in thecase ofthe other pawls. The locking pawl 223 has" on the'opposite side of the pivot an extension "228 (Figure' 36) which is threaded at 230 toreceivea-"spring"retaining. adjustment bolt 231 which extendsuinside one:end of'a helical Jcompressionspring 1232, the? opposite ze'nd iofwhich engages in a spring retainer 233 on the indexing head.

The locking pawl 223 carries, intern ediate between its pivot and its teeth, trips 234, which are mounted on shaft 235 (Figures 35 and 36) journalled at 2136 on the locking pawl, at an intermediate point between itsipivot and its teeth. The trips 234 areurged toward circumferential limiting position by torsional springs 237 having engagement at the ends respectively in the trip and the pawl and urging the pawl counterclockwise in Figure 36. In the circumferential limiting position trip dogs .238

engage stops 240 on the outside of the locking pawl 1 (Figures 34, 35 and. 36),-' and in that position trip dogs 241 are disposed 'inwardly'into the path of tripcams 242 which are mounted on the indexing plates. In movement of the locking plate: clockwise in Figures 34 and 36; the

trip cams engage the dogs 241 on the trips and the trips are not free'to move because of the engagement of dogs 238 with stops 240, and so theentire locking pawl is forces the plunger into engagement in the driving plate.

,The plunger desirably has a separable head which. is held removably in T head' slot; 261. The chucks can heretractedand held in retracted position by projection 259 .engagingthe outside of the chuck housing chuck is retracted and rotated.

-'The teeth 246 in the driving platearespaced an integer I plusone-half times the teeth spacing of the indexing cammed out of engagement with the indexing wheel. On 7 reverse movement, however, the trip' cams.242 deflect dogs 241 out of the way by turning the trip without mov ing the locking pawl outwardly. Thismotion is shown in Figure 43.

evident that the index wheel has one tooth for every indexing position.

. As seen in Figure 39, motion of the indexing plates in the direction of the arrows in Figure 39 has caused the cam 222 to engage follower 221 andforce stop pawl 216 into retracted position as shown. Operating pawl 211 is engaging the outside of one of the indexing teeth of the indexing wheel and locking, pawl 223-is in full engagement with two teeth of the indexing wheel.

In the next position as shown'in Figure 40, the indexing plates have continued their motion clockwise, until operating pawl 211 has been forced by its spring into engagement with the next tooth of the indexing wheel.

Stop pawl 216 has not moved appreciably, but trip cams 242 have engaged dogs 241 on thetrips, and forced locking pawl 223 out of engagement with theindexing wheel. The indexing wheel is now completely unlocked and free to turn under the motion of operating pawl 211.

In the next position as shown in Figure 41, with the indexing wheel fully unlocked, operating pawl 211 has advanced the indexing wheel, while stop pawl 216.is still held out of engagement with the indexing wheel. by its u Considering now Figures 39 to 42 in detail, it will be plate, so that by shifting the chuck engagement from one tooth 246 to the other it is possible to obtain a half-todth difference in spacing which isirequired in setting up fpr the left hand. cuts rather than the right hand, cuts or vice versa. An index pointer 247. on the driving plate aligns with marksR on the face plate when the chucks areset for cutting right hand diamonds, andwith mark L for left. hand diamonds. Mark 243. on the face plate ..the heavy roll from one chuck tooth engagement in the use it is detached by removing the pivot bolt at 263, and Ythe roll jack is shown at 263in disassembled position by cam. Trip cams 242 have moved past trip dogs 241 on the trips, a1lowing locking pawl 223 to move inward into engagement with the ends of the teeth under the action of its spring.

In the next position of the indexing mechanism as shown pawl 216 intoengagement with one of the teeth, while locking pawl 223 has engaged two of th e teeth, clamping the indexing wheel against further motion forward. In this position a row of recesses in the work roll will be machined.

(Figure l) is a reference markfor check purposes. f The driving plate has an extension262 (Figure '25) which pivotally connects at 263 to screw 264 of a roll a jack 265 which has an opposed screw 266 pivoted at 267 in the frame. By turning the roll jack housing through a bar inserted at 268, right and left hand threads on the respective screws manipulate the driving plate to adjust driving plate to another. When theroll jack is not in the dot-and-dashulines. I

. For use in picking up the work roll by a crane, a

' lifting lug is provided at 270 in the driving plate. t

In operation, the driving plate is attached to the work .roll and the work roll is assembled on the centers. The setup gauge is brought to the correct position to the end of the roll by adjusting nuts 90 and 92. Starting with a setting ofthe cutters which may belin the right hand diagonal position as shown, the roll is adjusted to suit chucks 245 on the face plate so that they engage the notchesfor. teeth inithe. driving plate which. correspond to the .right hand setting of the cutters. The drum cam the cutters are started in operation by starting the cutting motors. Thedr'um cam moves the cutters into engagement with the work roll and makes initialcuts 271,:

. suitably six in number, corresponding to Figure 4. 'As the drum cam continues to turnit indexes the work roll Therindexing cam will next retract the indexing plates until the operating pawl engages the next succeeding tooth, prior to assuming the position of Figure 39 on the next cycle. During thisretraction motion the indexing plates carry the trip cam past the trips, simply turning the trips as shown in Figure 43 without displacing the 50 by a face plate 243 which is keyed on spindle 56 by key 244, and which carries at diametrally opposite posi- A tions chucks 245 (Figure 32), each of which .engages selectively in one of the teeth 246 on the outside of driving plate 247 which is secured by bolts 248 on the end of the work roll, extending through hardened bushings or dowels 248 andsurrounds the center 57. .Each chuck,

adjustment \is made by manipulating the longitudinal feed by moving1lo'ngitudinal indexing handle 103 to release key 101 from longitudinal indexing rack 96, and

then adjusting hand wheel. 82, one tooth distance, and then lowering the longitudinal indexing .key to itsengagement with the next tooth then the cam and row 272 completed. i

' In the new position as shown inFigure 6, a succession of rings of cuts 272 are made, and then the icutters are adjustedlongitudinally as already described. This is repeated untilitheentire roll is covered with rings of right hand cutsas shownin Figure 7-. After the rollis covis started.

ered with left hand cuts as shown in Figure 7, the setup is changed to make right hand cuts. This is accomplished by withdrawing locking pin 163 on each cutter and shifting the cutter angularly by the turning bar 164 to the right hand position, and restoring the locking key. The longitudinal indexing is adjusted by one-half tooth distance by removing pivot pin 107 in Figures 20 and 23, reversing key 101 and restoring pivot pin 107.

Likewise the angular indexing is shifted one-half tooth distance on the indexing plate by attaching the roll jack to the driving plate, releasing the plungers of chucks 245 from the teeth 246, advancing the driving plate angularly by one-half tooth distance on the indexing wheel and then restoring the plungers of chucks 245 to the next tooth 246 of the driving plate.

The adjustment now places the cutters in position to make a series of rings of left hand cuts 273 as shown in Figure 8, under the control of the indexing and feed cams. After the first of the left rings 273 have been cut, the longitudinal index is changed by hand as already described and the machine is operated to make the remaining left hand cuts 274, etc. in Figure 9.

The final result is to produce on the surface of the roll of Figure 10 right hand diamond or leaf depressions 275 and left hand diamond or leaf depressions 276 in diamond relationship with one another as shown, so that a floor plate or other material can be produced by rolling through the roll against a similar roll or a plain roll or a roll having similar cooperating raised portions corresponding to the depressions of Figure 10.

It will be evident that the drum cams are designed so that while both cams turn at all times, one cam always has a straight or ineffective portion opposite a deflecting portion on the other cam and vice versa.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, and I, therefore, claim all such insofar as they fall within the reasonable spirit and scope of my claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In mechanism for machining recesses on the surface of a working roll, means for mounting said working roll turnable about an axis, an indexing plate turnable about said axis, cam means for advancing and retracting said indexing plate around said axis, an indexing gear connected to said working roll and rotating with said working roll about said axis, an operative pawl on said indexing plate engaging said indexing gear for advancing said indexing gear around said axis, a stop pawl engaging said indexing gear at selective positions and when engaged preventing forward motion of said gear, a locking pawl engaging said indexing gear at selective positions and when engaged preventing motion in both directions, cam means operative between said indexing plate and said stop pawl for moving said stop pawl into and out of engagement with said indexing gear, a trip cam on said indexing plate for releasing said locking pawl, and trip means on said locking pawl engaged by said trip earn for releasing said locking pawl at a predetermined position on the forward motion of said indexing plate.

2. Mechanism of claim 1, in combination with release mechanism on said trip means for permitting said trip cam to pass beyond said trip means without releasing said locking pawl on retraction of said indexing plate.

3. In mechanism for machining recesses on the surface of a working roll, means for mounting said working roll to turn about an axis, a driving plate connected with said working roll and turnable with the working roll about said axis, an indexing gear having indexing teeth and turnable about said axis, automatic means for driving said indexing gear tooth-by-tooth about said axis, tooth recesses in said driving plate being spaced one-half tooth distance with respect to said indexing gear, and chuck means connected to said indexing gear and operating on said driving plate for selectively engaging one or the other of the tooth recesses in the driving plate to secure one-half tooth advance.

References Cited in the file of this patent UNITED STATES PATENTS 276,346 Brooks et al Apr. 24, 1883 370,705 Koch Sept. 27, 1887 1,216,018 Trundle Feb. 13, 1917 1,430,385 Komarek Sept. 26, 1922 1,521,137 Veeder Dec. 30, 1924 1,635,491 Milliken July 12, 1927 2,148,433 Burden Feb. 28, 1939 2,180,771 Poole Nov. 21, 1939 2,354,673 Fabian Aug. 1, 1944 2,458,344 Carroll Jan. 4, 1949 2,529,332 Fickett et al. Nov. 7, 1950 2,530,502 Baney Nov. 21, 1950 2,690,703 Creek Oct. 5, 1954 2,719,696 Palka Oct. 4, 1955 FOREIGN PATENTS 675,927 Germany May 22, 1939 676,901 Great Britain Aug. 6, 1952 

